Dynamic properties of a high- T sub c superconductor: Direct evidence for non-BCS behavior
Journal Article
·
· Physical Review, B: Condensed Matter; (USA)
- IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598 (US)
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (USA)
Measurements of the temperature dependence of the infrared conductivity of the CuO{sub 2} planes in YBa{sub 2}Cu{sub 3}O{sub 7} in the superconducting state are reported. Remarkably, we find that the temperature dependence of {sigma}{sub 1}({omega},{ital T}) is independent of {omega} for {omega}{approx lt}500 cm{sup {minus}1}, and that it is the same as that of the nuclear Korringa product, 1/{ital T}{sub 1}{ital T}. These observations indicate that for the best-characterized high-temperature superconductor, YBa{sub 2}Cu{sub 3}O{sub 7}, the phenomenology of dynamic properties is fundamentally different from that of conventional superconductors.
- OSTI ID:
- 5561856
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 43:10; ISSN PRBMD; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Application of the polaron-transport theory to. sigma. (. omega. ) in Tl sub 2 Ba sub 2 Ca sub 1 minus x Gd sub x Cu sub 2 O sub 8 , YBa sub 2 Cu sub 3 O sub 7 minus. delta. , and La sub 2 minus x Sr sub x CuO sub 4
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Wed Oct 31 19:00:00 EST 1990
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BCS THEORY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
HIGH-TC SUPERCONDUCTORS
INFRARED RADIATION
LOW TEMPERATURE
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PENETRATION DEPTH
PHOTOCONDUCTIVITY
PHYSICAL PROPERTIES
RADIATIONS
REFLECTIVITY
SUPERCONDUCTORS
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
VERY LOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BCS THEORY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
HIGH-TC SUPERCONDUCTORS
INFRARED RADIATION
LOW TEMPERATURE
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PENETRATION DEPTH
PHOTOCONDUCTIVITY
PHYSICAL PROPERTIES
RADIATIONS
REFLECTIVITY
SUPERCONDUCTORS
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
VERY LOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES